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Graphene oxide and/or phyllosilicate natural rubber composite material for space balloons and preparation method of graphene oxide and/or phyllosilicate natural rubber composite material

A layered silicate and composite material technology, applied in the field of composite material preparation, can solve problems such as poor compatibility and loss of mechanical properties

Inactive Publication Date: 2020-09-04
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, natural rubber itself, as a non-polar rubber, has poor compatibility with graphene oxide and layered silicate, so it is difficult for graphene oxide and layered silicate to disperse evenly into rubber molecules in the rubber matrix. chains, resulting in a large amount of agglomeration of graphene oxide and layered silicate, which loses its relatively perfect mechanical properties.

Method used

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  • Graphene oxide and/or phyllosilicate natural rubber composite material for space balloons and preparation method of graphene oxide and/or phyllosilicate natural rubber composite material
  • Graphene oxide and/or phyllosilicate natural rubber composite material for space balloons and preparation method of graphene oxide and/or phyllosilicate natural rubber composite material
  • Graphene oxide and/or phyllosilicate natural rubber composite material for space balloons and preparation method of graphene oxide and/or phyllosilicate natural rubber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Weigh 150g of graphite oxide slurry with a concentration of 2%, in which the solid content of graphite oxide is 3g, add water to dilute to a concentration of 3‰, adjust the pH to 8, and then use a cell pulverizer for ultrasonication, with a working interval of 2s and a power of 750W , time 60min, wherein tested by the atomic force electron microscope (AFM), the graphene oxide in the graphene oxide aqueous dispersion is 1.5μm in lateral dimension, the thickness of the graphene oxide sheet is 0.9nm, and the number of layers is 3 layers; then at 70 ℃ Next, add 0.3g interface agent aminopropyltriethoxysilane coupling agent (KH550) to the graphene oxide aqueous dispersion, and carry out mechanical stirring at 100r / min for 6h, and the modified graphene oxide obtained by filtering the residue Dispersions;

[0050] Get 165g of natural rubber latex with a solid content of 60%, add 1g of ammonia water as a stabilizer, and mix at room temperature. In order to prevent demulsificati...

Embodiment 2

[0067] (1) Take 150g of graphite oxide water slurry with a concentration of 4%, wherein the solid content of graphite oxide is 6g, add water to dilute to a concentration of 6‰, adjust the pH to 8, and then use a cell pulverizer to perform ultrasonication with a working interval of 2s. The power is 750W, and the time is 60min. According to the atomic force electron microscope (AFM) test, the graphene oxide in the graphene oxide aqueous dispersion has a lateral size of 1.5μm, a graphene oxide sheet thickness of 0.9nm, and the number of layers is 3 layers; then Add 0.6g interface agent γ-(methacryloyloxy)propyltrimethoxysilane coupling agent (KH570) to the graphene oxide aqueous dispersion at 70°C, and perform mechanical stirring at 100r / min for 6h, The modified graphene oxide dispersion obtained by filtering the residue;

[0068] (2) Get 165g of natural rubber latex with a solid content of 60%, add 5g of ammonia as a stabilizer, and mix at normal temperature. In order to prevent...

Embodiment 3

[0080] (1) Take 150g of graphite oxide water slurry with a concentration of 6%, wherein the graphite oxide has a solid content of 9g, add water to dilute to a concentration of 9‰, adjust the pH to 8, and then use a cell pulverizer to perform ultrasonication with a working interval of 2s. The power is 750W, and the time is 60min. According to the atomic force electron microscope (AFM) test, the graphene oxide in the graphene oxide aqueous dispersion has a lateral size of 1.5μm, a graphene oxide sheet thickness of 0.9nm, and the number of layers is 3 layers; then Add 0.9 g of epoxy natural rubber latex with an interface agent solid content of 40% to the graphene oxide aqueous dispersion at 70°C, and perform mechanical stirring at 100 r / min for 6 hours, and filter the residue for later use;

[0081] (2) Get 165g of natural rubber latex with a solid content of 60%, add 5g of KOH aqueous solution as a stabilizer, and mix at normal temperature. In order to prevent demulsification in ...

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Abstract

The invention discloses a graphene oxide and / or phyllosilicate natural rubber composite material for a space balloon and a preparation method of the graphene oxide and / or phyllosilicate natural rubbercomposite material. The composite material comprises the following components in parts by weight: 100 parts of natural rubber, 0.1-10 parts of graphene oxide and / or layered silicate and 0.1-6 parts of a stabilizer, wherein the graphene oxide and the phyllosilicate are pre-modified by an interface agent. Graphene oxide and / or phyllosilicate are / is pretreated through the interface agent, the polarity of graphene oxide and / or phyllosilicate is reduced, good compatibility with natural latex is achieved, and strong interface bonding is achieved. Through nano-compounding of natural latex, grapheneoxide and phyllosilicate, the mechanical property, the radiation aging resistance and the air tightness of the film are greatly improved, and the film can be used as an advanced technology for improving the ball film of the space balloon.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a composite of graphene oxide and / or layered silicate natural rubber used to optimize the airtightness, tensile and tensile properties of existing space balloon membranes Materials and their preparation methods. Background technique [0002] Near space is broadly defined as the region between 20 and 100 km. The air in the near-space airspace is so thin that most fixed-wing aircraft cannot fly in it, and it is difficult for satellites to maintain their flight orbits due to the excessive gravity. However, the airflow in this area is relatively stable, and the air flow is relatively small. It is an ideal airspace for deploying high-altitude hovering balloons or airships. The high-altitude scientific balloon is an important vehicle for high-altitude and air-reading scientific research. One mu of this type of balloon is zero pressure, and its volume is 10 4 ~10 6 m ...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08K3/04C08K7/00C08K9/06C08K13/06
CPCC08K7/00C08K9/06C08K13/06C08K3/042C08L7/02
Inventor 吴晓辉尹田雨李鹏举张立群肖迪娥谌志鹏
Owner BEIJING UNIV OF CHEM TECH
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